Why Performance Matters

Users expect fast, responsive applications. Every millisecond counts for user experience and SEO.

Server Components

Next.js App Router introduces Server Components by default:

async function ProductList() {
  const products = await db.products.findMany();
  return products.map(p => <ProductCard key={p.id} {...p} />);
}

Data fetching happens on the server, reducing client-side JavaScript.

Image Optimization

import Image from 'next/image';

export function ProductImage({ src, alt }) {
  return (
    <Image
      src={src}
      alt={alt}
      width={400}
      height={300}
      sizes="(max-width: 768px) 100vw, 50vw"
    />
  );
}

Proper image sizing prevents layout shifts and speeds up loading.

Caching Strategies

• Static generation for stable pages
• Incremental revalidation for dynamic content
• Edge caching for global applications

Bundle Optimization

Analyzing bundle size helped identify opportunities:

• Dynamic imports for heavy components
• Tree-shaking unused code
• Optimizing third-party libraries

Core Web Vitals

Focusing on LCP, FID, and CLS led to measurable improvements in user experience metrics.